Analytical Studies of Laser Beam Propagation Through the Atmosphere

El-Saftawy, M. I.; El-Hameed, Afaf M. Abd; Khalifa, N. S.

doi:10.1142/9789812814609_0009

Cited by 5 publications

(6 citation statements)

References 1 publication

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“…Based on the previous postulates, the laser intensity delivered to the infinitesimal surface is determined using an analytical model in which laser intensity is proportional directly to the laser power and inversely to infinitesimal altitude and laser divergence. This laser intensity is given by [13], [14]:…”

Section: Laser Disturbing Potentialmentioning

confidence: 99%

Location of triangular equilibrium points in the perturbed CR3BP with laser radiation pressure and oblateness

Khalifa¹

2018

IJAA

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This paper represents a semi-analytical study of the effect of ground-based laser radiation pressure on the location of triangular points in the framework of the planar circular restricted three-body problem (CR3BP). The formulation includes both the effects of oblateness of J2 in addition to laser radiation pressure, where laser’s disturbing function expanded in Legendre polynomials up to the first order. Earth-Moon system is considered in which a laser station is located on Earth and sends laser beams toward the infinitesimal body. The model takes into account the effect of Earth's atmosphere on laser beam propagation. The numerical application emphasis that the location of the triangular points affected by the considered perturbations.

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Section: Laser Disturbing Potentialmentioning

confidence: 99%

Location of triangular equilibrium points in the perturbed CR3BP with laser radiation pressure and oblateness

Khalifa¹

2018

IJAA

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“…Based on the previous postulates, the laser intensity delivered to the satellite surface is determined using an analytical model in which laser intensity is proportional directly to the laser power and inversely to satellite altitude and laser divergence. This laser intensity is given by [7], [5]:…”

Section: Laser Force As Conservative Forcementioning

confidence: 99%

Laser orbital perturbations in Hamiltonian framework

El-Saftawy¹,

Khalifa²

2018

IJAA

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The effect of laser photon pressure on the spacecraft’s orbit is modeled. The force model developed taking into consideration atmospheric beam attenuation. However, adaptive optics assumed fixed on the laser system in order to eliminate the effect of atmospheric turbulence. The force of a single laser pulse proved as a conservative force. Consequently, its potential obtained using Legender polynomial. Assuming a spherical Earth, the Hamiltonian of the problem developed in terms of Dalaunay elements up to the first zonal harmonic. Using different ground-based laser systems, the model applied to the satellite Ajisai of NORAD ID 16908 and the LEO debris ASTRO-F DEB of NORD ID 29054. The numerical results emphasized that laser pressure has an effect on the orbit and it is well agreed with the results of the Newtonian treatment of the problem.

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“…Based on the previous postulates, the laser intensity delivered to the debris surface is determined using an analytical model in which laser intensity is proportional to the laser power and inversely to debris altitude and laser divergence. This laser intensity is given by El-Saftawy et al (2007) and Khalifa (2009):…”

Section: Laser Beam Propagationmentioning

confidence: 99%

Dynamical study of low Earth orbit debris collision avoidance using ground based laser

Khalifa

2015

NRIAG Journal of Astronomy and Geophysics

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The objective of this paper was to investigate the orbital velocity changes due to the effect of ground based laser force. The resulting perturbations of semi-major axis, miss distance and collision probability of two approaching objects are studied. The analytical model is applied for low Earth orbit debris of different eccentricities and area to mass ratio and the numerical test shows that laser of medium power $5 kW can perform a small change DV of an average magnitude of 0.2 cm/s which can be accumulated over time to be about 3 cm/day. Moreover, it is confirmed that applying laser DV results in decreasing collision probability and increasing miss distance in order to avoid collision.ª 2015 Production and hosting by Elsevier B.V. on behalf

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Analytical Studies of Laser Beam Propagation Through the Atmosphere

Cited by 5 publications

References 1 publication

Location of triangular equilibrium points in the perturbed CR3BP with laser radiation pressure and oblateness

Location of triangular equilibrium points in the perturbed CR3BP with laser radiation pressure and oblateness

Laser orbital perturbations in Hamiltonian framework

Dynamical study of low Earth orbit debris collision avoidance using ground based laser

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